Rotary pump



ROTARY PUMP Filed Feb. 25,1924

' 30 valved orifices, and which serves Patented .Feb. 17, 1925i UNITED 'STATES PATENT OF mes.

Application .fi ld I'ebrnary 25, 1924} Serial No. 695,061.

has, among other advantages, the

rthr aLdvantagesn of dispensing with the -complicated devices existing in s1milar 'apparatuses, such as connecting rods, cams, crank-shafts, etc.; of being comparatively cheap to manufacture;

and of requiring only low power for driving 20 it. It consists substantially of a series of cylindersarranged in the form of a cross and preferably nstructedas a single casting, in each of which cylinders a piston of suitable form is adapted to work under the action of asPring which has a constant tendency to force the said piston outwards. This cross is stationary, being fixed at its centre on a hollow axle which is in communication with the -aforesaid cylinders tfhro h or elivery of the comprcssed fluid.

The parts above referred to are arranged in a movable drum or casing which can be rotated'by means of a driving belt pasihg 85 around its periphery. One of the side members of this drumrotates on the hollow axle aforesaid, the other side member hein fixed to a stub shaft mounted, like the said ollow axle, upon a suitable support, or being do coupled to the end of a driving shaft.

. The drum comprises its inner periphery a guide track which is ectze'ntri to the centre of the said drum, and against which the spring-pressed pistons flconstanfly bear. The rotation of this drum hasthe eflect of causin the pistons to make suc: cessively to-an -fromovements, 'whereby these pistons in succession suck the fluid which enters the cylinders through suitable 5o ducts that are provided:-on one hand in one of the side members of the drum and on the other hand, at the base of each cylinder, and which saidpistons deliver the said fluid into the hollow axle whence it is led to its phwe of use.

[In order to facilitate the understanding of the description hereinafier given, the a c companying drawings illustrate by way of example a constructional form of the improved apparatus of this invention.

ig*ure 1 is a cross Section of the improved apgaratns taken at right angles to its axis, an

Figure 2 is a vertical section taken along the axis.

A, A A, A are the cylmders arranged in the form of a cross, formed near their bases with orifices B in which are fitted suction valves C. D are pistons of suitable form Working in these cylinders. L are coiled springs (or other types) bearing against the inner ends of the c hnders, and having a;constant tendency to d pistons outward in the direction of the arrow f. F is a hollow xle mounted on a support K,and communictn with each rive the said of the cylinders A, A A, A t roughsuit .able orifices fitted with delive The cross of stationary.

H is a movble drum containing the entire arrangement -above'described. M track formed on the internal periphery of the drnm *H;it is eccentric to this drum, and the ends of the pistons D are maintained in contact with the said track by the action valves G. cylinders and t e axle F are of the springs L. A driving belt g. vise also not shown) passes Tund thesaid drum;

is a rolling not showxi) connected-to a J is a stlshaft arranged in the coirtined axis of the hollow axle F, and on it is mounted one'side membeiofthe drin H. This stub shaft J iS-mounted, like the hollow 'axle F, on a vertical support (net shown).

enters the fluid tobe treated. k

It will be perceived that on the movable drui H being driven at a determined sped, in succession.

track (compressionand delivery period) in the side 'member of the drum fixed on the shaft J through them' from the nature of this invention.

Du the suction period the fluid, entring at. flows through the valve 6 and passes into the cylinders 'through the ori- It 1s to be learLy. understood that the.

hereinboforo described constructionl form is given solely b way of example, and that it may be modi ed constructionafl in any desi1ed manner Without thereby epart};}ihg for instance, the valves'maybe replaced by an annular diaphragm or any' other device that will serve as a. non-returfl valve for the compressed or delivered fluid.

LikeWise, the p aratus may be driven b direct drive from 516 end'of a. driving shn by means of a collpling sleeve or s'uitable toothed gearing.

Having now' particularly desribed and ascertain'ed the'nture of my said invntion and in whaQmanner the same' is tobe performed, I declare that what I "daim is:

' A rotary pump or the like, com(prising a;

rotary casmg' provided with'a 'flui inlet; a stationary, hollow shaft where0n said casing is mounted; a cylinder unit within the asing fixedat its center to sa1d shaft and eirrbodying a erue'iform set of cylinders, each cylinder having a fluid inlet adjacent its innor of the circumferential wall of th casing with which the outr ends of the constantly engaged.

' In testimon whereofI aflx my signature.

IERRE J OUANNEAX.

pistons are 

